diff -urN libX11-1.0.3.orig/modules/lc/Utf8/lcUTF8Load.c libX11-1.0.3/modules/lc/Utf8/lcUTF8Load.c
--- libX11-1.0.3.orig/modules/lc/Utf8/lcUTF8Load.c	2006-06-23 06:22:22.000000000 +0900
+++ libX11-1.0.3/modules/lc/Utf8/lcUTF8Load.c	2006-12-07 14:22:54.000000000 +0900
@@ -50,15 +50,22 @@
     if (lcd == (XLCd) NULL)
 	return lcd;
 
-    /* The official IANA name for UTF-8 is "UTF-8" in upper case with a dash. */
-    if (!XLC_PUBLIC_PART(lcd)->codeset ||
-	(_XlcCompareISOLatin1(XLC_PUBLIC_PART(lcd)->codeset, "UTF-8"))) {
-	_XlcDestroyLC(lcd);
-	return (XLCd) NULL;
+    /* The official IANA name for UTF-8 is "UTF-8" in upper case with a dash. */    if (!XLC_PUBLIC_PART(lcd)->codeset) {
+        _XlcDestroyLC(lcd);
+        return (XLCd) NULL;
     }
 
-    _XlcAddUtf8LocaleConverters(lcd);
-    _XlcAddUtf8Converters(lcd);
+    /* This loader only supports "UTF-8" and "GB18030" codeset */
+    if (!_XlcCompareISOLatin1(XLC_PUBLIC_PART(lcd)->codeset, "GB18030")) {
+        _XlcAddGB18030LocaleConverters(lcd);
+        _XlcAddUtf8Converters(lcd);
+    } else if (!_XlcCompareISOLatin1(XLC_PUBLIC_PART(lcd)->codeset, "UTF-8")) {
+        _XlcAddUtf8LocaleConverters(lcd);
+        _XlcAddUtf8Converters(lcd);
+    } else {
+        _XlcDestroyLC(lcd);
+        return (XLCd) NULL;
+    }
 
     return lcd;
 }
diff -urN libX11-1.0.3.orig/src/xlibi18n/lcUTF8.c libX11-1.0.3/src/xlibi18n/lcUTF8.c
--- libX11-1.0.3.orig/src/xlibi18n/lcUTF8.c	2006-06-23 06:22:23.000000000 +0900
+++ libX11-1.0.3/src/xlibi18n/lcUTF8.c	2006-12-07 03:52:32.000000000 +0900
@@ -1842,3 +1842,614 @@
     _XlcSetConverter(lcd, XlcNMultiByte, lcd, XlcNFontCharSet, open_utf8tofcs);
     _XlcSetConverter(lcd, XlcNWideChar, lcd, XlcNFontCharSet, open_wcstofcs);
 }
+
+/* ========================== iconv Stuff ================================ */
+
+/* from XlcNCharSet to XlcNMultiByte */
+
+static int
+iconv_cstombs(conv, from, from_left, to, to_left, args, num_args)
+    XlcConv conv;
+    XPointer *from;
+    int *from_left;
+    XPointer *to;
+    int *to_left;
+    XPointer *args;
+    int num_args;
+{
+    XlcCharSet charset;
+    char *name;
+    Utf8Conv convptr;
+    int i;
+    unsigned char const *src;
+    unsigned char const *srcend;
+    unsigned char *dst;
+    unsigned char *dstend;
+    int unconv_num;
+
+    if (from == NULL || *from == NULL)
+	return 0;
+
+    if (num_args < 1)
+	return -1;
+
+    charset = (XlcCharSet) args[0];
+    name = charset->encoding_name;
+    /* not charset->name because the latter has a ":GL"/":GR" suffix */
+
+    for (convptr = all_charsets, i = all_charsets_count-1; i > 0; convptr++, i--)
+	if (!strcmp(convptr->name, name))
+	    break;
+    if (i == 0)
+	return -1;
+
+    src = (unsigned char const *) *from;
+    srcend = src + *from_left;
+    dst = (unsigned char *) *to;
+    dstend = dst + *to_left;
+    unconv_num = 0;
+
+    while (src < srcend) {
+	ucs4_t wc;
+	int consumed;
+	int count;
+
+	consumed = convptr->cstowc(conv, &wc, src, srcend-src);
+	if (consumed == RET_ILSEQ)
+	    return -1;
+	if (consumed == RET_TOOFEW(0))
+	    break;
+
+    /* Use stdc iconv to convert widechar -> multibyte */
+
+	count = wctomb(dst, wc);
+	if (count == 0)
+	    break;
+	if (count == -1) {
+	    count = wctomb(dst, BAD_WCHAR);
+	    if (count == 0)
+		break;
+	    unconv_num++;
+	}
+	src += consumed;
+	dst += count;
+    }
+
+    *from = (XPointer) src;
+    *from_left = srcend - src;
+    *to = (XPointer) dst;
+    *to_left = dstend - dst;
+
+    return unconv_num;
+
+}
+
+static XlcConvMethodsRec iconv_cstombs_methods = {
+    close_converter,
+    iconv_cstombs,
+    NULL
+};
+
+static XlcConv
+open_iconv_cstombs(from_lcd, from_type, to_lcd, to_type)
+    XLCd from_lcd;
+    char *from_type;
+    XLCd to_lcd;
+    char *to_type;
+{
+    lazy_init_all_charsets();
+    return create_conv(from_lcd, &iconv_cstombs_methods);
+}
+
+static int
+iconv_mbstocs(conv, from, from_left, to, to_left, args, num_args)
+    XlcConv conv;
+    XPointer *from;
+    int *from_left;
+    XPointer *to;
+    int *to_left;
+    XPointer *args;
+    int num_args;
+{
+    Utf8Conv *preferred_charsets;
+    XlcCharSet last_charset = NULL;
+    unsigned char const *src;
+    unsigned char const *srcend;
+    unsigned char *dst;
+    unsigned char *dstend;
+    int unconv_num;
+
+    if (from == NULL || *from == NULL)
+	return 0;
+
+    preferred_charsets = (Utf8Conv *) conv->state;
+    src = (unsigned char const *) *from;
+    srcend = src + *from_left;
+    dst = (unsigned char *) *to;
+    dstend = dst + *to_left;
+    unconv_num = 0;
+
+    while (src < srcend && dst < dstend) {
+	Utf8Conv chosen_charset = NULL;
+	XlcSide chosen_side = XlcNONE;
+	wchar_t wc;
+	int consumed;
+	int count;
+
+    /* Uses stdc iconv to convert multibyte -> widechar */
+
+	consumed = mbtowc(&wc, src, srcend-src);
+	if (consumed == 0)
+	    break;
+	if (consumed == -1) {
+	    src++;
+	    unconv_num++;
+	    continue;
+	}
+
+	count = charset_wctocs(preferred_charsets, &chosen_charset, &chosen_side, conv, dst, wc, dstend-dst);
+
+	if (count == RET_TOOSMALL)
+	    break;
+	if (count == RET_ILSEQ) {
+	    src += consumed;
+	    unconv_num++;
+	    continue;
+	}
+
+	if (last_charset == NULL) {
+	    last_charset =
+	        _XlcGetCharSetWithSide(chosen_charset->name, chosen_side);
+	    if (last_charset == NULL) {
+		src += consumed;
+		unconv_num++;
+		continue;
+	    }
+	} else {
+	    if (!(last_charset->xrm_encoding_name == chosen_charset->xrm_name
+	          && (last_charset->side == XlcGLGR
+	              || last_charset->side == chosen_side)))
+		break;
+	}
+	src += consumed;
+	dst += count;
+    }
+
+    if (last_charset == NULL)
+	return -1;
+
+    *from = (XPointer) src;
+    *from_left = srcend - src;
+    *to = (XPointer) dst;
+    *to_left = dstend - dst;
+
+    if (num_args >= 1)
+	*((XlcCharSet *)args[0]) = last_charset;
+
+    return unconv_num;
+}
+
+static XlcConvMethodsRec iconv_mbstocs_methods = {
+    close_tocs_converter,
+    iconv_mbstocs,
+    NULL
+};
+
+static XlcConv
+open_iconv_mbstocs(from_lcd, from_type, to_lcd, to_type)
+    XLCd from_lcd;
+    char *from_type;
+    XLCd to_lcd;
+    char *to_type;
+{
+    return create_tocs_conv(from_lcd, &iconv_mbstocs_methods);
+}
+
+/* from XlcNMultiByte to XlcNChar */
+
+static int
+iconv_mbtocs(conv, from, from_left, to, to_left, args, num_args)
+    XlcConv conv;
+    XPointer *from;
+    int *from_left;
+    XPointer *to;
+    int *to_left;
+    XPointer *args;
+    int num_args;
+{
+    Utf8Conv *preferred_charsets;
+    XlcCharSet last_charset = NULL;
+    unsigned char const *src;
+    unsigned char const *srcend;
+    unsigned char *dst;
+    unsigned char *dstend;
+    int unconv_num;
+
+    if (from == NULL || *from == NULL)
+	return 0;
+
+    preferred_charsets = (Utf8Conv *) conv->state;
+    src = (unsigned char const *) *from;
+    srcend = src + *from_left;
+    dst = (unsigned char *) *to;
+    dstend = dst + *to_left;
+    unconv_num = 0;
+
+    while (src < srcend && dst < dstend) {
+	Utf8Conv chosen_charset = NULL;
+	XlcSide chosen_side = XlcNONE;
+	wchar_t wc;
+	int consumed;
+	int count;
+
+    /* Uses stdc iconv to convert multibyte -> widechar */
+
+	consumed = mbtowc(&wc, src, srcend-src);
+	if (consumed == 0)
+	    break;
+	if (consumed == -1) {
+	    src++;
+	    unconv_num++;
+	    continue;
+	}
+
+	count = charset_wctocs(preferred_charsets, &chosen_charset, &chosen_side, conv, dst, wc, dstend-dst);
+	if (count == RET_TOOSMALL)
+	    break;
+	if (count == RET_ILSEQ) {
+	    src += consumed;
+	    unconv_num++;
+	    continue;
+	}
+
+	if (last_charset == NULL) {
+	    last_charset =
+		_XlcGetCharSetWithSide(chosen_charset->name, chosen_side);
+	    if (last_charset == NULL) {
+		src += consumed;
+		unconv_num++;
+		continue;
+	    }
+	} else {
+	    if (!(last_charset->xrm_encoding_name == chosen_charset->xrm_name
+		  && (last_charset->side == XlcGLGR
+		      || last_charset->side == chosen_side)))
+		break;
+	}
+	src += consumed;
+	dst += count;
+    }
+
+    if (last_charset == NULL)
+	return -1;
+
+    *from = (XPointer) src;
+    *from_left = srcend - src;
+    *to = (XPointer) dst;
+    *to_left = dstend - dst;
+
+    if (num_args >= 1)
+	*((XlcCharSet *)args[0]) = last_charset;
+
+    return unconv_num;
+}
+
+static XlcConvMethodsRec iconv_mbtocs_methods = {
+    close_tocs_converter,
+    iconv_mbtocs,
+    NULL
+};
+
+static XlcConv
+open_iconv_mbtocs (from_lcd, from_type, to_lcd, to_type)
+    XLCd from_lcd;
+    char *from_type;
+    XLCd to_lcd;
+    char *to_type;
+{
+    return create_tocs_conv(from_lcd, &iconv_mbtocs_methods );
+}
+
+/* from XlcNMultiByte to XlcNString */
+
+static int
+iconv_mbstostr(conv, from, from_left, to, to_left, args, num_args)
+    XlcConv conv;
+    XPointer *from;
+    int *from_left;
+    XPointer *to;
+    int *to_left;
+    XPointer *args;
+    int num_args;
+{
+    unsigned char const *src;
+    unsigned char const *srcend;
+    unsigned char *dst;
+    unsigned char *dstend;
+    int unconv_num;
+
+    if (from == NULL || *from == NULL)
+	return 0;
+
+    src = (unsigned char const *) *from;
+    srcend = src + *from_left;
+    dst = (unsigned char *) *to;
+    dstend = dst + *to_left;
+    unconv_num = 0;
+
+    while (src < srcend) {
+	unsigned char c;
+	wchar_t wc;
+	int consumed;
+
+    /* Uses stdc iconv to convert multibyte -> widechar */
+
+	consumed = mbtowc(&wc, src, srcend-src);
+	if (consumed == 0)
+	    break;
+	if (dst == dstend)
+	    break;
+	if (consumed == -1) {
+	    consumed = 1;
+	    c = BAD_CHAR;
+	    unconv_num++;
+	} else {
+	    if ((wc & ~(wchar_t)0xff) != 0) {
+		c = BAD_CHAR;
+		unconv_num++;
+	    } else
+		c = (unsigned char) wc;
+	}
+	*dst++ = c;
+	src += consumed;
+    }
+
+    *from = (XPointer) src;
+    *from_left = srcend - src;
+    *to = (XPointer) dst;
+    *to_left = dstend - dst;
+
+    return unconv_num;
+}
+
+static XlcConvMethodsRec iconv_mbstostr_methods = {
+    close_converter,
+    iconv_mbstostr,
+    NULL
+};
+
+static XlcConv
+open_iconv_mbstostr(from_lcd, from_type, to_lcd, to_type)
+    XLCd from_lcd;
+    char *from_type;
+    XLCd to_lcd;
+    char *to_type;
+{
+    return create_conv(from_lcd, &iconv_mbstostr_methods);
+}
+
+/* from XlcNString to XlcNMultiByte */
+static int
+iconv_strtombs(conv, from, from_left, to, to_left, args, num_args)
+    XlcConv conv;
+    XPointer *from;
+    int *from_left;
+    XPointer *to;
+    int *to_left;
+    XPointer *args;
+    int num_args;
+{
+    unsigned char const *src;
+    unsigned char const *srcend;
+    unsigned char *dst;
+    unsigned char *dstend;
+
+    if (from == NULL || *from == NULL)
+	return 0;
+
+    src = (unsigned char const *) *from;
+    srcend = src + *from_left;
+    dst = (unsigned char *) *to;
+    dstend = dst + *to_left;
+
+    while (src < srcend) {
+	int count = wctomb(dst, *src);
+	if (count < 0)
+	    break;
+	dst += count;
+	src++;
+    }
+
+    *from = (XPointer) src;
+    *from_left = srcend - src;
+    *to = (XPointer) dst;
+    *to_left = dstend - dst;
+
+    return 0;
+}
+
+static XlcConvMethodsRec iconv_strtombs_methods= {
+    close_converter,
+    iconv_strtombs,
+    NULL
+};
+
+static XlcConv
+open_iconv_strtombs(from_lcd, from_type, to_lcd, to_type)
+    XLCd from_lcd;
+    char *from_type;
+    XLCd to_lcd;
+    char *to_type;
+{
+    return create_conv(from_lcd, &iconv_strtombs_methods);
+}
+
+/***************************************************************************/
+/* Part II: An iconv locale loader.
+ *
+ *Here we can assume that "multi-byte" is iconv and that `wchar_t' is Unicode.
+ */
+
+/* from XlcNMultiByte to XlcNWideChar */
+static int
+iconv_mbstowcs(conv, from, from_left, to, to_left, args, num_args)
+    XlcConv conv;
+    XPointer *from;
+    int *from_left;
+    XPointer *to;
+    int *to_left;
+    XPointer *args;
+    int num_args;
+{
+    char *src = *((char **) from);
+    wchar_t *dst = *((wchar_t **) to);
+    int src_left = *from_left;
+    int dst_left = *to_left;
+    int length, unconv_num = 0;
+
+    while (src_left > 0 && dst_left > 0) {
+	length = mbtowc(dst, src, src_left);
+
+	if (length > 0) {
+	    src += length;
+	    src_left -= length;
+	    if (dst)
+	        dst++;
+	    dst_left--;
+	} else if (length < 0) {
+	    src++;
+	    src_left--;
+	    unconv_num++;
+        } else {
+            /* null ? */
+            src++;
+            src_left--;
+            if (dst) 
+                *dst++ = L'\0';
+            dst_left--;
+        }
+    }
+
+    *from = (XPointer) src;
+    if (dst)
+	*to = (XPointer) dst;
+    *from_left = src_left;
+    *to_left = dst_left;
+
+    return unconv_num;
+}
+
+static XlcConvMethodsRec iconv_mbstowcs_methods = {
+    close_converter,
+    iconv_mbstowcs,
+    NULL
+} ;
+
+static XlcConv
+open_iconv_mbstowcs(from_lcd, from_type, to_lcd, to_type)
+    XLCd from_lcd;
+    char *from_type;
+    XLCd to_lcd;
+    char *to_type;
+{
+    return create_conv(from_lcd, &iconv_mbstowcs_methods);
+}
+
+static int
+iconv_wcstombs(conv, from, from_left, to, to_left, args, num_args)
+    XlcConv conv;
+    XPointer *from;
+    int *from_left;
+    XPointer *to;
+    int *to_left;
+    XPointer *args;
+    int num_args;
+{
+    wchar_t *src = *((wchar_t **) from);
+    char *dst = *((char **) to);
+    int src_left = *from_left;
+    int dst_left = *to_left;
+    int length, unconv_num = 0;
+
+    while (src_left > 0 && dst_left >= MB_CUR_MAX) { 
+	length = wctomb(dst, *src);		/* XXX */
+
+        if (length > 0) {
+	    src++;
+	    src_left--;
+	    if (dst) 
+		dst += length;
+	    dst_left -= length;
+	} else if (length < 0) {
+	    src++;
+	    src_left--;
+	    unconv_num++;
+	} 
+    }
+
+    *from = (XPointer) src;
+    if (dst)
+      *to = (XPointer) dst;
+    *from_left = src_left;
+    *to_left = dst_left;
+
+    return unconv_num;
+}
+
+static XlcConvMethodsRec iconv_wcstombs_methods = {
+    close_converter,
+    iconv_wcstombs,
+    NULL
+} ;
+
+static XlcConv
+open_iconv_wcstombs(from_lcd, from_type, to_lcd, to_type)
+    XLCd from_lcd;
+    char *from_type;
+    XLCd to_lcd;
+    char *to_type;
+{
+    return create_conv(from_lcd, &iconv_wcstombs_methods);
+}
+
+static XlcConv
+open_iconv_mbstofcs(
+    XLCd from_lcd,
+    const char *from_type,
+    XLCd to_lcd,
+    const char *to_type)
+{
+    return create_tofontcs_conv(from_lcd, &iconv_mbstocs_methods);
+}
+
+void
+_XlcAddGB18030LocaleConverters(
+    XLCd lcd)
+{
+
+    /* Register elementary converters. */
+    _XlcSetConverter(lcd, XlcNMultiByte, lcd, XlcNWideChar, open_iconv_mbstowcs);
+    _XlcSetConverter(lcd, XlcNWideChar, lcd, XlcNMultiByte, open_iconv_wcstombs);
+
+    /* Register converters for XlcNCharSet. This implicitly provides
+     * converters from and to XlcNCompoundText. */
+
+    _XlcSetConverter(lcd, XlcNCharSet, lcd, XlcNMultiByte, open_iconv_cstombs);
+    _XlcSetConverter(lcd, XlcNMultiByte, lcd, XlcNCharSet, open_iconv_mbstocs);
+    _XlcSetConverter(lcd, XlcNMultiByte, lcd, XlcNChar, open_iconv_mbtocs);
+    _XlcSetConverter(lcd, XlcNString, lcd, XlcNMultiByte, open_iconv_strtombs);
+    _XlcSetConverter(lcd, XlcNMultiByte, lcd, XlcNString, open_iconv_mbstostr);
+
+    /* Register converters for XlcNFontCharSet */
+    _XlcSetConverter(lcd, XlcNMultiByte, lcd, XlcNFontCharSet, open_iconv_mbstofcs);
+
+    _XlcSetConverter(lcd, XlcNWideChar, lcd, XlcNString, open_wcstostr);
+    _XlcSetConverter(lcd, XlcNString, lcd, XlcNWideChar, open_strtowcs);
+    _XlcSetConverter(lcd, XlcNCharSet, lcd, XlcNWideChar, open_cstowcs);
+    _XlcSetConverter(lcd, XlcNWideChar, lcd, XlcNCharSet, open_wcstocs);
+    _XlcSetConverter(lcd, XlcNWideChar, lcd, XlcNChar, open_wcstocs1);
+
+    /* Register converters for XlcNFontCharSet */
+    _XlcSetConverter(lcd, XlcNWideChar, lcd, XlcNFontCharSet, open_wcstofcs);
+}
+